Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153420201001Investigating the sorption behavior of Cesium and cobalt on soil samples.11211058510.21608/ajnsa.2020.20093.1303ENRedaShehaNuclear Chemistry Department, Hot laboratories Center, Atomic Energy AuthorityAhmedRoushdyHelwan UniveristyEhabAl-ShazlyAEABahaaSalahHelwan UniveristyAbd-Elhakim T. KandilAbd-Elhakim T. KandilHelwan UniveristyJournal Article20191125Two soil samples were collected from El-Dabaa site and denoted as DNS/C (Dabaa natural soil / Calcite) and DNS/Q (Dabaa natural soil / Quartz). They were characterized using X-Ray Fluorescence (XRF) analysis, Fourier transform infrared spectroscopy (FT–IR) analysis and X-Ray diffractometer (XRD) analysis. The soil samples were applied as solid phases for retention of 134Cs and 60Co radionuclides from their aqueous solutions. The effect of different parameters as pH value, contact time, and competing ion on the sorption behavior of 134Cs and 60Co was studied in static conditions. The maximum sorption capacity of DNS/C was 1.16 and 4.28 mg.g-1 for Cs(I) and Co(II) ions, while it was 3.19 and 4.76 mg.g-1 for sorption of both metal ions onto DNS/Q respectively. Different kinetic models were applied to assess the sorption of Cs(I) and Co(II) ions from their aqueous solutions by soil samples. The sorption process followed pseudo-second-order kinetics clarifying that chemisorption could be regarded as the controlling step. The role of temperature on sorption of Cs(I) and Co(II) was studied and the values thermodynamic parameters (∆Ho, ΔGo and ΔSo) were determined. 34Cs radionuclides exhibited ∆Ho values amounted to -14.5416 and -13.0962 kJ.mol-1 for sorption onto DNS/C and DNS/Q samples. These negative values confirmed the exothermic nature of sorption process. The enthalpy change attained the values 25.3895 and 24.67368 kJ.mol-1 for 60Co radionuclide sorption onto the soil samples DNS/C and DNS/Q. These positive values confirmed the endothermic nature of sorption process.Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153420201001Stresses Induced by LOCA in Steam Generator Collector of VVER1000132011058810.21608/ajnsa.2020.22763.1325ENAzza AhmedHassanSafety of Nuclear Fuel Cycle Department, Egyptian Nuclear and Radiological Regulatory Authority,Cairo, EgyptSergei PavlovichNikonovDepartment of Theoretical and Experimental Physics of Nuclear Reactors, National Research Nuclear University MEPHI, Moscow, RussiaDina AliAmerNuclear and Radiation Engineering Department, Faculty of Engineering, Alexandria Universityhttps://orcid.org/00KhaledAhmedSafety of Nuclear Fuel Cycle Department, Egyptian Nuclear and Radiological Regulatory Authority, Cairo, EgyptJournal Article20200203During Double End Break Loss of Coolant Accident (DEBLOCA) in VVER1000 reactor, in the first second, pressure waves had been noticed in all points hitting the main components of the primary circuit. Studying the stresses due to DEBLOCA is important to avoid equipment failure. The main attention is focused on the pressure drops on the equipment, because this parameter determines the dynamic loads on the equipment, which can lead to its failure. ATHLET code is used to obtain pressure and temperature variation with time during the accident for the VVER1000 reactor Kalinin-3. The results are used in ANSYS Finite element package to calculate stresses in steam generator collector. The stress just before the emergency (at time 0.014 sec) was 4.3e7 pa and becomes 4.38e6 pa just after the emergency (at time =0.022 second). Fluctuations appear with two peaks of highest amplitude of 1.87e7 and 2.38e7 pa at time of 0.06 and 0.094 sec respectively which is well below the allowable stress. The results indicate safe operation of the equipment.Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153420201001Spatial Cone Beam Computed Tomography (CBCT) Radiological Findings of Florid Cemento- Osseous Dysplasia: Case Report and Review of Literature212511058910.21608/ajnsa.2020.25704.1336ENRadwa AbdelbassitSallamNational center of Radiation research and TechnologyJournal Article20200311Florid cemento-osseous dysplasia (FCOD) is a condition that characteristically affects the jaws of middle-aged black women. Cemento-osseous dysplasia also has been classified to periapical, focal, florid and familial cemento-osseous dysplasia. Radiographically, FCOD appears as well defined radiopaque, symmetrical mass lobules, located in the apical part of the teeth with encapsulated margin. Cone-Beam Computed Tomography (CBCT) is a clinical application of ionizing radiation. CBCT is widely used in dental and maxillofacial imaging. This technology has been used for diagnosis and treatment planning for both adult and pediatric patients in orthodontics. It is advantageous being reconstructed in three dimensions, image quality, a 1: 1 ratio that allowed reliable dimensions, the possibility for craniofacial imagining, and lower radiation doses compared to traditional CT.CBCT is beneficial in diagnosis of this lesion with perfect evaluation of the effect on the surrounding structures. This paper presents two cases of black female patients who were radiographically diagnosed with FCODEgyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153420201001Ameliorative effect of vitamin E against radiofrequency radiation emitted from mobile phone-induced hematological and histopathological alterations in male albino mice263811059010.21608/ajnsa.2020.25996.1339ENMona H.IbraheimDepartment of Physics, Faculty of Science, Zagazig University, EgyptAzizaAminDepartment of Pathology, Faculty of Veterinary Medicine, Benha University, EgyptJournal Article20200316Abstract <br /> Radiofrequency radiation is widespread in the surrounding environment and their frequent sources are mobile phones. Consequently, the present research was aimed to study the effect of radiofrequency radiation released from mobile phones on some hematological parameters (RBC, HB, MCV, MCH, MCHC, WBC, P LT, LYM %) and histopathological changes in male white mice. In this work, forty adult male albino mice (25-30 gm weight) divided into four equal groups; A, B, C, and D. Group A was used as a negative control group, Group B used as a negative control group for vitamin E solution, group C was exposed to EMR for 2hr ⁄day for 3 weeks without vitamin E and Group D, treated with Vitamin E solution and exposed to EMR for 2hr ⁄day for 3 weeks. The obtained results revealed that significant changes in RBCs, Hb, HCT, MCV, MCHC, PLT, and WBCs were observed in group C. Additionally, variable histopathological alterations in the liver, kidney, lung, heart, spleen, and brain post-exposure to mobile phone radiation were also demonstrated. Vitamin E has improved these harmful effects induced by radiofrequency radiation on different investigated tissues via their capacity to decline the pathological alterations demonstrated in these organs post-exposure to mobile phone radiation as well as via improving different evaluated blood parameters. Consequently, we could conclude that, vitamin E was able extensively to reduce the harmful influences of mobile phone radiation on blood parameters and the histopathological changes in the liver, kidney, lung, heart, spleen and brain tissues.Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153420201001Anti-Tumor Effect of Green Tea Extract, Simvastatin and Gamma Radiation on Solid Tumor in Mice395211061610.21608/ajnsa.2020.22827.1322ENIbrahim Y.AbdelrahmanRadiation Biology Department, National Center for Radiation Research and Technology0000-0002-6333-7431HusseinEl-KashefEgyptian Atomic Energy Authority, National Center for radiation Research and technology, Radiation Biology DepartmentNagwa H.A.HassanZoology department, Faculty of Science, Ain-Shams UniversityJournal Article20200121The current study was conducted of six groups (n=12) to define the efficacy of epigallocatechin gallate, simvastatin and gamma radiation individually or combined together to reduce solid tumor size induced by intramuscular injection of EC cells in the right thigh of the targeted mice. Magnetic resonance imaging device 1.5 Tesla used for radiology imaging of the normal and ascites-bearing mice under anesthesia. The animals with solid tumor were followed up daily for recording deaths, tumor size, rate of inflammation and gangrene in the tumor area of hind limb. Magnetic resonance imaging showed the intraperitoneal ascites and the soft organs (liver, kidney and intestine) which were bright in the case of ascites-bearing mouse than the normal control. Triple therapy regimen significantly reduced the tumor size (662.6±12.5) compared to the positive control (825±21.8) and increased survival rate to 66.7% compared to 25% in the positive control. Triple therapy reduced the inflammation of tumor area, preventing the gangrene incidence, and showed the best value of T/C=142, ILS=42.11 and TIR %=19.6 compared to the positive control and single treatments, so it is considered as an anti-tumor regimen according to the National Cancer Institute criteria.Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153420201001Ultrastructure deformation of flight muscles and bioenergetics changes in honey bee workers treated with pesticides536311584310.21608/ajnsa.2020.21369.1315ENEman AhmedMahmoudBiological Applications Dept., Nuclear Research Centre, Atomic Energy AuthorityJournal Article20191223Beehives are exposed to the risk of pesticide contamination by honey bee workers who transport polluted pollens and nectar to the hive. This work illustrated the hazardous effects of two pesticides, avermectin (broklen pure) and chlorpyrifos (ictafos) on flight muscles of bee workers, Apis. mellifera. Muscle fibers of insects treated with ictafos appeared more susceptible than treated with broklen pure. They appeared irreversible damage, degeneration, and necrosis of the sarcostyles, sarcosomes, and nuclei after treated with ictafos. While broklen pure s induced some fragmentation of nucleus damage, cellular membranes, and sarcosomes. Additionally, ictafos induced more significant effects on bee workers bioenergetics than broklen pure. It induced not only a significant reduction in gross energy (GE), crude fiber (CF) but also a highly significant reduction in crude protein (CP). However, it induced a highly significant increase in nitrogen-free extracts (NFE) compared with the control. Finally, we recommend prohibiting the use of ictafos as a pesticide in agricultural products.Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153420201001Developing a New Model for Description of Micro Size Particles in SEM Images for Safeguards Purposes647111584410.21608/ajnsa.2020.26198.1340ENSameh ElSayedShabanNuclear Safeguards and Physical Protection, Egyptian Nuclear and Radiological Regulatory Authority, Cairo , EgyptJournal Article20200319Scanning Electron microscope (SEM) is a fast screening tool for identification of uranium and thorium particles. In the field of micro-particle analysis for safeguards purposes, estimation of uranium size is necessary information especially for scanning of swipes or environmental samples at nuclear facilities. SEM can be used to visualize micro sized particles of any nuclear material. It gives secondary electron images (SEI) at different magnifications power. In this work, the model JEOL 6510 LV instrument that has capabilities to image samples in a range of magnification from X5 to X300,000 was used. The process of imaging was done at optimum conditions; SS=50, WD=10 and appropriate pressure. The system determines the size of any particle in SEI using internal image. Many trials were performed to accomplish a correlation between micro size and pixels to estimate the size of targeted particles. Here, a mathematical model was developed to describe the relation between micro size and pixels depending on an assumption that is called "numbers to zeros" assumption. The mathematical description was manipulated in three different ways; linearly, exponentially and by using artificial neural network (ANN). The model in its three forms was validated using large numbers of SEIs and comparisons with commercial softwares. The fitting correlation coefficient for linear and exponential manipulation was found to be 0.99997 and 1 respectively. While, the performance of the trained data in ANN was 6x10-10.Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153420201001A ROAD MAP FOR NUCLEAR KNOWLEDGE MANAGEMENT PROGRAM FOR REGULATORY BODY728011607410.21608/ajnsa.2020.34271.1380ENRaniaGomaaQA/QC Department,
Egyptian Nuclear and Radiological Regulatory Authority (ENRRA)
Cairo, Egypt0000-0002-2520-8321Karim AbdelazizEl AdhamNuclear Fuel Cycle DepartmentJournal Article20200706Nuclear Knowledge Management (NKM) is an important pillar for the capacity building program of the regulatory body. It is handled as a long term investment that yields to excellence, effectiveness, and risk management of critical knowledge. Recently, the requirements for optimization and sustainability have led to increased interest in business intelligence and knowledge management domains. In general, the nuclear industry is knowledge-based, as it relies on skilled workers and their know-how. Newcomer countries face common challenges related to brain drain, data overloads, and aging of the qualified workforce that could lead to loss of nuclear knowledge. As a result the need to develop the regulatory practices to ensure that interested parties collaborate, share and manage the evolved nuclear knowledge is significant. This paper discusses the approach applied by the national regulatory body to develop the NKM program as a tool to support the regulatory decision and maintain public trust. It highlights the real practice to improve the interactions between knowledge, organization, culture, processes, and employee's competencies.Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153420201001Particle size effect of silica gel on the ɤ-radiation induced electrical conductivity of urea aqueous solutions818711622810.21608/ajnsa.2020.20634.1307ENKh. A.Sife-eldeenEgyptain atomic energy authority - national center for radiation research and technologyJournal Article20191207Different concentrations (0.1, 3, 6 M) of urea aqueous Solutions (UAS) have been irradiated with 60Co- ɤ-rays in the presence of silica gel (SG) with different particle size (0.1-0.5mm) at room temperature. The radiation induced electrical conductivity (RIC) of the irradiated solutions was measured. The RIC values of the 0.1 M solutions increase as the particle size of SG decreases i.e., the particle surface area increases. This observation points to a radiation induced chemical reactions, which are catalyzed by SG. These reactions, probably, yield products, which increase the RIC such as urea peroxide (UP). On the other hand, different behavior was observed in the case of 3, 6 M solutions, where, the RIC increases as particle size increase. So, the mechanism of production of the species which increase the RIC of 0.1 M samples is different than that in the case of 3, 6 M. In all irradiated samples the pH values tend to increase slightly as particle size increases. A mechanism was proposed to explain the obtained data.Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153420201001Characterization of the Effect of ɤ-Radiation Absorbed Dose on the Electrical Conductivity of Aqueous Urea Solutions in the Presence of Silica Gel :A Preliminary Dosimetric Study889211622910.21608/ajnsa.2020.22233.1320ENKh. A.Sife-eldeenEgyptain atomic energy authority - national center for radiation research and technologyJournal Article20200111ɤ-radiolysis of 6M- aqueous urea solutions, in the presence of silica gel (SG), significantly, increases the values of electrical conductivity (RIC) of the solutions, relative to that in the absence of SG. Some dosimetric characteristics were studied, such as the effects of absorbed dose, absorbed dose rate, and post-irradiation storage time on the RIC of the irradiated 6M- aqueous urea solutions in the presence of SG (>0.16mm - 0.2mm). A linear relationship between the RIC of the solutions and the absorbed dose (R2 = 0.998) was observed from 0.240 to 17.670 kGy. The uncertainty in the dose-response function was found to be in the range 0.040-0.320 at 95% confidence level. As dose rate increases the RIC-decreases in the range of 0.298 -1.19 kGy/h. The stability of the response (RIC) of the irradiated solutions is acceptable during post irradiation storage (14 days at 0 oC), where, the response (RIC) decreased at the end of the storage period, 0.49-2.8%%. The effective atomic number of this solution (7.08) was found to be compatible with biological tissues. The results show that the studied system can be considered as a promise dosimeter for low dose applications in the range 0.240 to 17.670 kGy, such as medical and food irradiation.Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153420201001Characteristics of Dielectric Behavior and AC Electrical Conductivity of Bulk Antimony Sulfide (Sb2S3)9310111623010.21608/ajnsa.2020.27596.1344ENHamedEl-SayedPhysics Department, Faculty of Education, Ain Shams University, Cairo, Egypt.HendAliphysic department, faculty of education , Ain shams university, Cairo, EgyptGehanSalemphysics , faculty of Education , Ain shams university, Cairo,EgyptMohamedMahmoudPhysics Department, Faculty of Education, Ain Shams University, Cairo, Egypt.Journal Article20200409The structural features and morphology of investigated Sb2S3 powder were analyzed by X-ray diffraction and scanning electron microscope techniques. The dependence of dielectric properties and ac conductivity of bulk Sb2S3 as pellet on both of frequency (102–106 Hz) and temperature (303-393 K) were studied. The dielectric constant (121.2-45.8) and dielectric loss (53.3-0.89) displayed noticeable dependence on frequency and in the investigated range of temperature 303-393 K. The frequency dependence of ac conductivity σac(ω) follows up the power relation; σac(ω) = Gωs. The frequency exponent s, diminished with the rise in temperature, implying that the correlated barrier hopping (CBH) is the predominant conduction mechanism. The ac conductivity exhibited a thermally activated nature. The localized states N(EF) values recorded in order of 1018 eV-1.cm-3 at specific temperatures for frequency of 800 Hz. Activation energy ΔE, calculated at different frequencies indicating a decrease from 117 meV to 89 meV with the increase in the frequency.Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153420201001Replacement of Cobalt in Medical Device Sterilization: Current Trends, Opportunities and Barriers to Adoption of X-ray and E-Beam Within the Medical Device Sterilization Market10211111623110.21608/ajnsa.2020.116231ENJournal Article20200827<strong>Radioactive sources, specifically Co-60, are crucially important to the medical device sterilization industry; however, their benefits must be balanced against the need to ensure that the materials are secure. Accelerator-based sterilization methods, including X-ray and E-Beam, can in many cases sufficiently replace Co-60 and ethylene oxide, the dominant modalities currently in use; however, a lack of hands-on experience with accelerators, regulations, and a lack of capacity have hampered faster adoption of these technologies. The market is likely to change, however, given public pressures against ethylene oxide and concerns over the cost and long-term supply chain robustness of Co-60. This may provide an opportunity for growth for accelerator capabilities. Current research at Sandia National Laboratories and Argonne National Laboratory, on behalf of the Department of Energy’s National Nuclear Security Administration Office of Radiological Security, is focused on developing an understanding of the medical device sterilization marketplace, the different modalities that are used to sterilize goods, and the drivers that affect the actors within it. Research at Pacific Northwest National Laboratory, in conjunction with the medical device sterilization industry, has focused on expanding the industry’s understanding of the capabilities of X-ray sterilization and developing data that can inform the industry’s consideration of a transition towards accelerator-based devices.</strong>Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153420201001Rheological Assessment of Different Bread Wheat Genotypes Induced via radiation and Hybridization11212111701110.21608/ajnsa.2020.23450.1326ENMohamed AbdelrazekAbdelaleemPlant research Department ,Nuclear Research Center, Atomic Energy Autoroty0000-0002-6900-5446Khaled FoadAl-azabPlant Research Department
Nuclear Research Center
Atomic Energy Authority0000-0003-4840-6870Journal Article20200203The study aimed to evaluate the physicochemical and rheological properties of flour samples for six commercial Egyptian bread wheat (two commercial varieties namely Giza-168 and Gemmeiza-11, and four promising lines namely L84, L148, M10, and M34). The sample of M10 which induced/mutated by gamma radiation at dose 350 Gy, showed the best physicochemical and rheological properties, i.e., ash, protein, wet gluten, gluten index, falling number, extraction percentage, and Zeleny value were 0.63, 14.1 %, 36.4 %, 87%, 567 sec., 83.8% and 58 %, respectively. The farinograph parameters water absorption (65.8%), dough development time (11 min) and dough stability (10.8 min) were significantly (P < 0.05) higher in M10 compared to all other samples under study. Furthermore, alveograph parameters showed the highest tenacity (142 mm), dough extensibility (107 mm) and dough deformation energy (499 10-4J). Thus, the promising sample induced via gamma radiation (M10) was the best for parameters in bread making.Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153420201001Gamma - Radiation-induced reaction of Sulfuric Acid with Silica gel: A Novel method for the formation of sulfonic acid - functionalized silica (SiO2-SO3H)12213311701310.21608/ajnsa.2020.25092.1333ENKh. A.Sife-eldeenEgyptain atomic energy authority - national center for radiation research and technologyHany MoharamHosniE A E AJournal Article20200303Radiation-induced reaction of sulfuric acid with silica gel (SG) was carried out using ɤ-radiation from a 60Co source at room temperature and, its mechanism were suggested. The formation of sulfonated SG (SiO2-SO3H) was confirmed by IR, thermal analysis (TGA/ DSC). Elemental analysis and morphological structure of treated SG (SGtreated) was investigated by scanning electron microscopy (SEM). According to the comparison of the SEM images of SG and SGtreated , it seems that, irradiation of SG in the presence of sulfuric acid leads to partial segmentation of SG particles. The IR spectra of the treated silica (SGtreated) is different from that of the SG. Where, peaks related to the presence of sulfunic group are observed, as well as shifts of SG peaks due to treatment. Also, TGA/ DSC of SGtreated is different from that of SG. Elemental analysis reveals that particle size of SG affects the S/O % value, where SGtreated with >0.16mm - 0.2mm particle size has the maximum value. Also, S/O% value, of >0.16mm - 0.2mm SG particle size, increased, linearly, with absorbed dose up to 80 kGy and then decresedat higher doses.Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153420201001CYANEX 925 As Potential Extractant For the Extraction and Separation of Zirconium (IV) And Niobium (V) From nitric acid Solution13414611717810.21608/ajnsa.2020.27556.1345ENJacquelineDaoudProfessor of Radio-Inorganic Chemistry,
Chemistry of Nuclear Fuel Department,
Hot Laboratories Centre,
Atomic Energy AuthorityMohamad MohamadZeidChemistry of Nuclear Fuel Department,
Hot Laboratories Centre,
Atomic Energy AuthorityMohamad MohamadIbrahimAssistant Professor,
Chemistry of Nuclear Fuel department,
Hot Laboratories Centre,
Atomic Energy AuthorityHisham FouadAlyProfessor of Nuclear Chemistry,
Chemistry of Nuclear Fuel department,
Hot Laboratories Centre,
Atomic Energy Energy AuthorityJournal Article20200411The potential use of CYANEX 925 in kerosene for the extraction and separation of Zirconium (IV) and Niobium (V) from nitric acid solution is explored. The effects of the different parameters affecting the extraction process as extractant, metal, nitric acid and nitrate concentrations as well as temperature were separately investigated. Stripping investigations on the recovery of Zr(IV) and Nb(V) from their loaded organic solutions were also carried out. The obtained results indicate that the extracted metal species are Zr(NO3)4.CYANEX 925 and Nb(OH)2(NO3)3.CYANEX 925 for Zr(IV) and Nb(V), respectively. The difference in the extraction and stripping behavior of the investigated metals indicated that a good separation between Zr(IV) and Nb(V) could be obtained when carrying out the extraction from low nitric acid concentration at low temperature or when using 1M sulphuric acid for stripping 99% of Zr(IV) with nearly no stripping of Nb(V) from the loaded organic solution. The obtained results indicate that CYANEX 925 is a promising extractant for high extraction and separation of Zr(IV) and Nb(V) from nitric acid solution compared with other organophosphorus extractants.Egyptian Society of Nuclear Sciences and Applications (ESNSA)Arab Journal of Nuclear Sciences and Applications1110-045153420201001Effect of Thermal Cycling on Oxidation of Nickel Based Superalloys in Presence of Aggressive Ions14715411717710.21608/ajnsa.2020.19768.1306ENGaberElawadiCyclotron Facility, Nuclear Research centre, Atomic Energy AuthoritySalem MohamedAbdel-SamadHead of Experimental Nuclear Physics Dept. , Cyclotron Project, Nuclear Research Center, Atomic Energy Authority, Egypt0000-0002-3914-6125EzzatElshazlyMetallurgy Department, Nuclear Research Centre, Atomic Energy Authority.Journal Article20191213Superalloys are considered as potential candidates to be used in high temperature applications. In the present study, experimental measurements of high temperature oxidation in presence of aggressive ions of Nickel base superalloy (Hastelloy-X) have been carried out at 700°C, 800°C and 900°C for exposure time durations of 1, 3, 5, 10, 20, 50 and 100 hours. The oxidation behavior of superalloy Hastelloy X in the presence of aggressive media, normally, NaCl and Na2SO4 is to identify the surface scales that formed. After oxidation experiments the samples were characterized using Scanning Electron Microscope (SEM) and X-ray diffraction (XRD) to find out the formed phases. The results showed that the major corrosion products formed are Nickel Chromites NiCr2O4 with some Chromium Cobalt Oxide CoCr2O4 spinels in additions to chromium oxide Cr2O3. The obtained results of Hastelloy X were compared with the results achieved previously for Inconel 617. In this study the activation energy of Hastelloy X was estimated and it is Ea = 57.84 KJ/mole.